FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP server can offer a grayscale JPEG via clipboard redirection, corrupting client memory and crashing it when the item is pasted as CF_DIB bitmap data.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 Exploit, Vendor Advisory, Mitigation
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 Exploit, Vendor Advisory, Mitigation
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 4
- Cpes+1 CPE criteria (now 1)NVD modified 2026-10-23 20:55
- StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-23 20:55
- StatusReceived → Undergoing AnalysisNVD modified 2026-10-15 16:17
- First seenCVSS 7.1NVD modified 2026-10-14 23:17
Affected (CPE criteria) 1
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
References 3
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 Exploit, Vendor Advisory, Mitigation
- https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data Third Party Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 Exploit, Vendor Advisory, Mitigation